Struct ScrollbarStyle 

pub struct ScrollbarStyle {
    pub thumb: Color,
    pub track: Option<Color>,
    pub width: ScrollbarWidthMode,
    pub thickness: f32,
    pub thickness_thin: f32,
    pub hover_boost: f32,
    pub hover_track: Color,
    pub min_thumb: f32,
    pub margin: f32,
    pub fade_delay_secs: f32,
    pub fade_secs: f32,
}

Overlay-scrollbar styling for one scroll container - the runtime mirror of the standard CSS properties scrollbar-color: <thumb> [<track>] and scrollbar-width: auto | thin | none (CSS Scrollbars Styling Level 1; both transpile 1:1 to the web backend). Set from the stylesheet by lumenc; the skin defaults live in skins/default.css via the --lumen-scrollbar-* tokens.

This component’s Default is the only place fallback visuals are defined (the blank-no-css contract): when no stylesheet rule matches, both the paint extract and the interaction FSM read these values. Fields without a real-CSS spelling today (minimum thumb length, fade timings) still live here - one struct a per-OS skin layer or future custom property can override without touching the FSM or the paint code.

Fields

thumb: Color

Thumb fill (scrollbar-color first value).

track: Option<Color>

Track fill (scrollbar-color second value). Some = painted whenever the bar is visible (CSS semantics); None = the fallback translucent track shown only while the bar is hovered (overlay convention).

width: ScrollbarWidthMode

scrollbar-width keyword.

thickness: f32

Bar thickness in logical pixels at scrollbar-width: auto (scrollbar-thickness CSS property).

thickness_thin: f32

Bar thickness in logical pixels at scrollbar-width: thin (scrollbar-thickness-thin CSS property).

hover_boost: f32

Thumb alpha multiplier while the bar is hovered / dragged (scrollbar-hover-boost CSS property).

hover_track: Color

Fallback hover-only track fill used when Self::track is None (scrollbar-track-hover CSS property).

min_thumb: f32

Minimum thumb length in logical pixels (theme minimum; scrollbar-min-thumb CSS property).

margin: f32

Inset from the viewport edges in logical pixels (scrollbar-margin CSS property).

fade_delay_secs: f32

Seconds of inactivity before the bars start fading out (scrollbar-fade-delay CSS property).

fade_secs: f32

Fade-out ramp length in seconds (scrollbar-fade-duration CSS property).

Implementations

impl ScrollbarStyle

pub fn thickness(&self) -> Option<f32>

Resolved bar thickness in logical pixels; None = bars hidden (scrollbar-width: none).

pub fn metrics(&self) -> Option<ScrollbarMetrics>

Geometry inputs for vertical_scrollbar / horizontal_scrollbar; None when bars are disabled.

Trait Implementations

impl Clone for ScrollbarStyle

fn clone(&self) -> ScrollbarStyle

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Component for ScrollbarStyle

where Self: Send + Sync + 'static,

const STORAGE_TYPE: StorageType = bevy_ecs::component::StorageType::Table

A constant indicating the storage type used for this component.

type Mutability = Mutable

A marker type to assist Bevy with determining if this component is mutable, or immutable. Mutable components will have Component<Mutability = Mutable>, while immutable components will instead have Component<Mutability = Immutable>.

fn register_required_components( _requiree: ComponentId, required_components: &mut RequiredComponentsRegistrator<'_, '_>, )

Registers required components.

fn clone_behavior() -> ComponentCloneBehavior

Called when registering this component, allowing to override clone function (or disable cloning altogether) for this component.

fn relationship_accessor() -> Option<ComponentRelationshipAccessor<Self>>

Returns [ComponentRelationshipAccessor] required for working with relationships in dynamic contexts.

fn on_add() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_add [ComponentHook] for this Component if one is defined.

fn on_insert() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_insert [ComponentHook] for this Component if one is defined.

fn on_discard() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_discard [ComponentHook] for this Component if one is defined.

fn on_remove() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_remove [ComponentHook] for this Component if one is defined.

fn on_despawn() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_despawn [ComponentHook] for this Component if one is defined.

fn map_entities<E>(_this: &mut Self, _mapper: &mut E)

where E: EntityMapper,

Maps the entities on this component using the given EntityMapper. This is used to remap entities in contexts like scenes and entity cloning. When deriving Component, this is populated by annotating fields containing entities with #[entities]

impl Debug for ScrollbarStyle

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ScrollbarStyle

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for ScrollbarStyle

fn eq(&self, other: &ScrollbarStyle) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ScrollbarStyle

impl StructuralPartialEq for ScrollbarStyle